138 ERNEST HILL AND L. G. HAYDON. 



tudinal vein, beneath the large median black patch on the 

 costa in some specimens merges in the adjoining yellow spot, 

 but in most is separated from it by a few dark scales. In 

 some a yellow spot is found in the middle of the posterior 

 branch of the first fork cell. In some specimens the whole 

 shaft of the fourth longitudinal vein is dark. There is a 

 yellow spot on the dark brown fringe opposite the termina- 

 tion of all branches of the first five veins, except the posterior 

 of the second, and sometimes an additional spot on the 

 proximal side of the sixth. 



Length of detached wing, 3'5 mm. to 4 mm. 



This species is not common. We have found it only in 

 three places on the higher levels, and never at sea level. It 

 is captured in houses. Was first found by Mr. H. S. Power 

 on his property forty miles from the coast, and we are indebted 

 to him for information that it has received generic and specific 

 title from Theobald. It is poorly represented in our collec- 

 tion, and there may be greater variety in wing patterns than 

 we have observed. 



The spotted legs cause it to resemble slightly Nyss or hyn - 

 chus pretoriensis, from which the absence of white 

 hind tarsi enables it to be readily distinguished, apart from 

 other differences, and the dark wing scales are brown as 

 contrasted with black in pretoriensis. 



The Larva (PL XVIII). — Determined on three speci- 

 mens, drawn from comparison of five, two being very small. 



General appearance. — Of medium length, and rather 

 sturdy build, uniform pale brown colour. 



Antenna. — No branched hair on shaft, terminal spines 

 equal, hair short, simple and undivided in the three instances 

 in which examination could be made. 



Frontal hairs. — Three pairs. Antero-external and pos- 

 terior subject to variation (PI. XVIII, fig. a; o^ is the external 

 frontal hair of a third larva) . 



Palmate hairs. — Very small and rudimentary on thorax, 

 larger but still rudimentary on first abdominal segment 

 (PL XVIII, fig. c), very large and well defined on second to 



